Showing papers on "Trojan published in 1992"
TL;DR: In the outer solar system, 20 million year integrations indicate the possible existence of stable Trojan-type tadpole orbits for all the other giant planets as mentioned in this paper, while the evolution of the unstable orbits is likely to be descriptive of the general evolutionary patterns of asteroidal orbits.
Abstract: Numerical N-body integrations have been conducted to study the stability of orbits of asteroids, which are co-orbital with the major planets. In Jupiter's case such celestial bodies are the well-known Trojan asteroids, while the newly discovered asteroid 1990MB is the first known «Martian Trojan.» In the outer solar system our 20 million year integrations indicate the possible existence of stable Trojan-type tadpole orbits for all the other giant planets. Horseshoe orbits were found to be unstable on the timescale of several million years. Since the evolution of the unstable orbits is likely to be descriptive of the general evolutionary patterns of asteroidal orbits we describe briefly the observed behavior of these orbits, too
53 citations
TL;DR: In this article, a bias-corrected analysis of lightcurve amplitude distributions for all published data on 23 Trojan, Hilda, and Cybele asteroids is presented. But the largest Trojans are found to have a higher mean-lightcurve magnitude than their low-albedo, main-belt counterparts.
46 citations
TL;DR: In this article, the use of new observational methods for exploring solar system evolutionary processes is evaluated, focusing on illustrative cases from the constraining of near-earth asteroid sources and the discovery of main-belt asteroid fragments which indicate Vesta to be a source of basaltic achondrite meteorites.
11 citations
TL;DR: In this article, a comparison between the present JHK photometry of selected Hilda and Trojan asteroids and photometry for both main belt asteroids and laboratory samples was made, and it was shown that while the leading Trojans and Hildas exhibit similar and homogeneous JHK colors, the trailing Trojan appears to be more heterogeneous Charcoal and magnetite provide the best match in terms of JHK colours.
9 citations
Journal Article•
TL;DR: Bounds to the Nordtvedt parameter are obtained from the motion of the first twelve Trojan asteroids in the period 1906-1990 as mentioned in this paper. But they do not cover all asteroids.
Abstract: Bounds to the Nordtvedt parameter are obtained from the motion of the first twelve Trojan asteroids in the period 1906- 1990. From the analysis performed, we derive a value for the inverse of the Saturn mass 3497.80±0.81 and the Nordtvedt parameter -0.56±0.48, from a simultaneous solution for all asteroids
8 citations
Posted Content•
TL;DR: Bounds to the Nordtvedt parameter are obtained from the motion of the first twelve Trojan asteroids in the period 1906-1990, from the analysis performed, they derive a value for the inverse of the Saturn mass 3497.
Abstract: Bounds to the Nordtvedt parameter are obtained from the motion of the first twelve Trojan asteroids in the period 1906-1990. From the analysis performed, we derive a value for the inverse of the Saturn mass 3497.80 \pm 0.81 and the Nordtvedt parameter -0.56 \pm 0.48, from a simultaneous solution for all asteroids.
7 citations
01 Jan 1992
TL;DR: The UK Schmidt Telescope (UKST) has been involved in asteroid work since 1979, initially on the UK-Caltech Asteroid Survey (UCAS) and more recently with the Lowell-UK Asteroids Survey (LUKAS).
Abstract: The UK Schmidt Telescope (UKST) has been involved in asteroid work since 1979, initially on the UK-Caltech Asteroid Survey (UCAS) and more recently with the Lowell-UK Asteroid Survey (LUKAS). In addition to these major programs, a number of smaller projects have been undertaken. These include searches for Trojan asteroids of Saturn and Jupiter, distant moons of Neptune and Uranus and distant solar system objects. Most of these are on-going projects.